631428346 has 4 divisors (see below), whose sum is σ = 947142522. Its totient is φ = 315714172.

The previous prime is 631428337. The next prime is 631428373. The reversal of 631428346 is 643824136.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 618069321 + 13359025 = 24861^2 + 3655^2 .

It is a super-2 number, since 2×631428346² = 797403512264591432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157857085 + ... + 157857088.

Almost surely, 2^631428346 is an apocalyptic number.

631428346 is a deficient number, since it is larger than the sum of its proper divisors (315714176).

631428346 is a wasteful number, since it uses less digits than its factorization.

631428346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315714175.

The product of its digits is 82944, while the sum is 37.

The square root of 631428346 is about 25128.2380202035. The cubic root of 631428346 is about 857.9092651499.

The spelling of 631428346 in words is "six hundred thirty-one million, four hundred twenty-eight thousand, three hundred forty-six".